SOLUTION: Trying to work out an Algeba Equation to apply to the following, Where C=JobCost and the percentage fee reduces depending on the jobcost... JobCost Fee 10000 35% 50000 30%

Question 918118: Trying to work out an Algeba Equation to apply to the following, Where C=JobCost and the percentage fee reduces depending on the jobcost...
JobCost Fee
10000 35%
50000 30%
100000 25%
500000 20%
1000000 15%
5000000 12%
10000000 10%
I understand these may not work out exactly correct (Especially the last 2 figures!)
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
you might want to use a curve fitting program that will fit an equation to the data.

your equation looks like it will fit an exponential equation, so i'm assuming it will be something in the form of y = x^a or y = e^x.

i used excel and modeled different equations to the data and the one that seems to fit the best is the power model.

this models y = ax^b

the equation becomes .

the R^2 value is .983 which indicates an extremely close fit.

the graph is shown below:

$$$

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